Nouns denoting natural phenomena
- gentle breeze
- wind moving 8-12 knots; 3 on the Beaufort scale
- sunset
- atmospheric phenomena accompanying the daily disappearance of the sun
- lightning
- abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light
- covalent bond
- a chemical bond that involves sharing a pair of electrons between atoms in a molecule
- mass defect
- the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles
- twister
- a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
- head sea
- a sea in which the waves are running directly against the course of the ship
- line squall
- a squall advancing along a front that forms a definite line
- frost
- weather cold enough to cause freezing
- whirlwind
- a more or less vertical column of air whirling around itself as it moves over the surface of the Earth
- fume
- a cloud of fine particles suspended in a gas
- heat wave
- a wave of unusually hot weather
- rainfall
- water falling in drops from vapor condensed in the atmosphere
- chemical energy
- that part of the energy in a substance that can be released by a chemical reaction
- exchange
- chemical process in which one atom or ion or group changes places with another
- brain wave
- (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
- sea
- turbulent water with swells of considerable size
- black-body radiation
- the electromagnetic radiation that would be radiated from an ideal black body; the distribution of energy in the radiated spectrum of a black body depends only on temperature and is determined by Planck's radiation law
- placebo effect
- any effect that seems to be a consequence of administering a placebo; the change is usually beneficial and is assumed result from the person's faith in the treatment or preconceptions about what the experimental drug was supposed to do; pharmacologists were the first to talk about placebo effects but now the idea has been generalized to many situations having nothing to do with drugs
- van der Waal's forces
- relatively weak attraction between neutral atoms and molecules arising from polarization induced in each particle by the presence of other particles
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